Medium Description
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 3982488 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x562774bb6000
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 7f21e5710e38 thread_stack 0x40000
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(my_print_stacktrace+0x2c)[0x56275df8e7dc]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(handle_fatal_signal+0x479)[0x56275d8b9819]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x110c0)[0x7f21e51fb0c0]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/lib/plugin/ha_rocksdb.so(_ZN7myrocks20Rdb_transaction_impl8set_syncEb+0x12)[0x7f21ce4e4c92]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/lib/plugin/ha_rocksdb.so(+0x265d54)[0x7f21ce4c5d54]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_Z14ha_prepare_lowP3THDb+0x59)[0x56275d906c79]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_Z15ha_commit_transP3THDbb+0x291)[0x56275d906621]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_ZN19System_table_access11close_tableEP3THDP5TABLEP18Open_tables_backupbb+0x5a)[0x56275df336fa]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_ZN25Gtid_table_access_context6deinitEP3THDP5TABLEbb+0x27)[0x56275def5087]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_ZN20Gtid_table_persistor4saveEP3THDPK4Gtid+0x197)[0x56275def56a7]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_ZN10Gtid_state4saveEP3THD+0x22)[0x56275def2712]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_Z18commit_owned_gtidsP3THDbPb+0x86)[0x56275d905a96]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_Z15ha_commit_transP3THDbb+0x37)[0x56275d9063c7]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_Z17trans_commit_stmtP3THD+0x30)[0x56275de02310]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_Z21mysql_execute_commandP3THDb+0x2b8a)[0x56275dd5c04a]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_Z11mysql_parseP3THDP12Parser_state+0x3dd)[0x56275dd6046d]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_ZN15Query_log_event14do_apply_eventEPK14Relay_log_infoPKcm+0x7ec)[0x56275df0184c]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(_Z27slave_worker_exec_job_groupP12Slave_workerP14Relay_log_info+0x23a)[0x56275df60e3a]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(handle_slave_worker+0x35b)[0x56275df42b8b]
/home/db_test/mysql-5.7.20-v4-rc-linux-x86_64/bin/mysqld(pfs_spawn_thread+0x1b1)[0x56275e307241]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x7494)[0x7f21e51f1494]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x3f)[0x7f21e3c48acf]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (562d7bdc7def): alter table user_top_song_pika drop index idx_utime
Connection ID (thread ID): 20
Status: NOT_KILLED
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
2018-08-16T03:01:51.442072Z mysqld_safe Number of processes running now: 0
